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Hand - pasted fiberglass surface adhesion, wrinkle, needle-eye prevention methods
Writer:admin    Released:2018-07-31 16:17:07    Type:【L】【M】【S
1. The product surface is sticky
In the production process of FRP products, because the products are exposed to moist air, or blower, electric fan and other exhaust equipment, the surface of direct blow products, resulting in excessive volatilization of styrene, the final layer of waxy resin, resulting in the surface of products sticky phenomenon.
Treatment method:
Avoid products made under low temperature or wet conditions.
Add 0.02% paraffin wax to the resin to prevent the accumulation of oxygen in the air.
Control the direction of ventilation to avoid air ventilation and reduce the volatilization of crosslinking agent.
Control the dosage of initiator and accelerant according to indoor environment temperature.
Or directly with the addition of paraffin resin operation.
2, the wrinkle
The wrinkling of FRP products often occurs in the plywood layer. The plywood does not wait for the first coating to be fully gelated, so the plywood on the second layer will cause the styrene in the second layer to partially dissolve the first layer of the plywood, causing the growth and wrinkles.
Treatment method:
The temperature of the working environment shall be appropriately increased. When the first layer of adhesive coating is mounted, the infrared light bulb shall be used to dry it and the second layer of adhesive coating shall be added.
After the gelation of the coating layer, apply the coating resin.Increasing the dosage of initiator and accelerator control studio environment temperature, usually between 18 ~ 20 ℃ advisable.
3, the eye of a needle
The main reason for the pinhole on the product surface is that small bubbles enter the coating before the gel.Or there is dust on the surface of the mould;Or when adding flame retardant resin, because the viscosity is too high, added to the volatile capacity of the agent, leaving a needle hole.
Processing method
During the molding process, dip roll is used to remove bubbles:
Suitable for adding antifoaming agents in resin, such as silicone oil, etc. :
Control working environment conditions, the surrounding humidity should not be too high, high temperature should not be too low
The amount of catalyst should not be excessive to avoid premature gelation and bubbles.
Increase the material should not be damp, if damp needs to be dry treatment
Keep mould surface clean.

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